Document Detail


M-response quantification: a technique.
MedLine Citation:
PMID:  6266370     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Median nerve responses in 13 patients and 9 normal subjects were evaluated using surface bipolar stimulation. The M response from surface electrodes placed upon the thenar eminence was recorded on a fiberoptic chart recorder and simultaneously subjected to true electronic integration. Comparison between the integrated M response and the M index (the product of the M response peak-to-peak amplitude and total duration) revealed a highly correlated linear regression. This linear relationship was present when stimulating both at the wrist (r2 = 0.96) and the antecubital fossa (r2 = 0.95). Statistically significant differences were observed between the integrated M response of 5 normal adult men and men with carpal tunnel syndrome (n 3, p less than 0.01) or anterior horn cell or neuropathic processes (n 4, p less than 0.001). Differences of borderline significance were noted between normal women (n = 4) and women with carpal tunnel syndrome (n 4, p less than 0.05) or anterior horn cell or neuropathic processes (n 2, p less than 0.01). There was no correlation between the integrated M response and the distal latency in patients with carpal tunnel syndrome. It is concluded that the M index is a highly reliable method of quantifying the M response as an approximation of integration in median nerve studies, but that this measurement holds little relationship with the presence of the distal neuropathic processes studied.
Authors:
B M Gans; G H Kraft
Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, Non-P.H.S.    
Journal Detail:
Title:  Archives of physical medicine and rehabilitation     Volume:  62     ISSN:  0003-9993     ISO Abbreviation:  Arch Phys Med Rehabil     Publication Date:  1981 Aug 
Date Detail:
Created Date:  1981-09-25     Completed Date:  1981-09-25     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  2985158R     Medline TA:  Arch Phys Med Rehabil     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  376-80     Citation Subset:  AIM; IM    
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MeSH Terms
Descriptor/Qualifier:
Adult
Aged
Carpal Tunnel Syndrome / physiopathology
Electric Stimulation
Electromyography / methods
Evoked Potentials
Female
Humans
Male
Median Nerve / physiopathology*
Middle Aged
Motor Neurons
Neuromuscular Diseases / physiopathology
Peripheral Nervous System Diseases / physiopathology*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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